SECONDARY REFRIGERANT HEAT-STORING AIR-CONDITIONING SYSTEM

摘要

PROBLEM TO BE SOLVED: To obtain a secondary refrigerant heat-storing air-conditioning system for performing efficient operation even if a hydrocarbon refrigerant, an ammonium refrigerant, or the like is used by performing the operation of a heat exchange operation between cycles when a primary-side performs an operation in an air-conditioning operation mode. SOLUTION: In a primary-side refrigeration cycle, a heat exchanger 2 for primary- side outside and a heat exchanger 4 for primary-side inside are used as a condenser and an evaporator, respectively, and a primary refrigerant flows in the order of a compressor 1, a primary-side first three-way valve 7, a primary side heat exchanger 2 for outside, a first inflation valve 5, a primary-side second three-way valve 8, a second inflation valve 6, the primary-side heat exchanger 4 for inside, a first four-way valve 9, and the compressor 1 (air-conditioning operation mode). In a secondary-side transport cycle, chill is received by a secondary-side heat exchanger 12 for inside via the primary-side heat exchanger 4 for inside, and a secondary refrigerant flows in the order of the secondary-side heat exchanger 4 for inside, a circulation pump 13, a secondary-side secondary three-way valve 16, and the secondary-side heat exchanger 12 for inside (heat-exchange operation mode between cycles).